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Development of spiral grinding process technology for glass lens hole machining
Soonkyu Je,여인주,정석경,김정대,Kye-Sung Lee,김건희 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.20 No.11
We propose a process technology that can be applied to a variety of applications by machining existing lenses to create an optical system required for research by modifying commercial glass optical systems. A 1-in. hole was created in an LF5 glass lens by drilling, followed by spiral grinding, and finally, precision spiral grinding. In addition, cracking and chipping were analyzed according to the processing process and optimized process conditions. We fabricated an achromatic doublet lens with a diameter of 50.8 mm, focal fa of 75 mm and fba of 65.7 mm, under optimized processing conditions. The processed lenses were determined by measuring the surface geometry of the lenses using ASI, and the lenses were inspected internally using OCT and dark field measurements to verify the internal sectional cracks and chipping of the lenses. The results confirm that there are no problems with the use of the hole in the existing glass lens as an optics. In addition, the manufactured lens will be available as an integrated optical system that can combine lenses with mirrors or detectors to create small systems and multi-axial views.
355nm UV 레이저를 이용한 마이크로 렌즈 어레이 제작 및 몰드 제작
제순규(Soonkyu Je),오재용(Jaeyong Oh),김광렬(Kwangryul Kim),박상후(Sanghoo Park),신보성(Bosung Shin) 한국레이저가공학회 2008 한국레이저가공학회 학술대회 논문집 Vol.2008 No.-
Micro lens array (MLA) is widely used in information technology (IT) industry fields, for examples such as a projection display, an optical power regulator, a micro mass spectrometer and for medical appliances. Recently, MLA have been fabricated and developed by using a reflow method, micro etching, electroplating, micromachining and laser local heating. Laser local thermal-expansion (LLTE) technology demonstrates the formation of microdots on the surface of several polymer substrate, in this paper. We have also investigated the new direct fabrication method of placing the MLA on the surface of nagative photoresist layer. We have obtained the 3D shape of the micro lens processed by UV laser irradiation and have experimentally verified the optimal process conditions. And we have finally fabricated MLA mold with nickel.
355nm UV 레이저를 이용한 마이크로 렌즈 어레이 쾌속 제작
제순규,박강수,오재용,김광렬,박상후,고정상,신보성 한국레이저가공학회 2008 한국레이저가공학회지 Vol.11 No.2
Micro lens array (MLA) is widely used in information technology (IT) industry fields, for examples such as a projection display, an optical power regulator, a micro mass spectrometer and for medical appliances. Recently, MLA have been fabricated and developed by using a reflow method, micro etching, electroplating, micromachining and laser local heating. Laser local thermal-expansion (LLTE) technology demonstrates the formation of microdots on the surface of polymer substrate, in this paper. We have also investigated the new direct fabrication method of placing the MLA on the surface of a SU-8 photoresist layer. We have obtained the 3D shape of the micro lens processed by UV laser irradiation and have experimentally verified the optimal process conditions.
Kim, Minsoo,Park, Changsu,Je, Soonkyu,Jang, Hoseung,Joo, Chulmin,Kang, Shinill IEEE 2018 IEEE/ASME transactions on mechatronics Vol.23 No.4
<P>Recent advances in display electronics, and micro- and nanophotonics have prompted development of novel nanofabrication technologies that enable production of high-fidelity periodic patterns over a large-area substrate. Scanning beam laser interference lithography (SBLIL) is a high-speed manufacturing process of such high-precision nanogratings; however, the precision of the nanopatterns produced by the SBLIL is negatively affected by several factors, including mechanical and optical phase jitters. Previous studies have focused on pattern production, but little research has been conducted on the error correction. In this paper, we propose a design methodology for comprehensive and real-time control of substrate motion and optical path difference in SBLIL process. We derived equations that relate SBLIL error sources to control inputs, and implemented the control strategy through acousto optical modulation and piezo electric actuation. The develop scheme was applied to the SBLIL process, and validated by presenting improved nano-pattern uniformity.</P>
롤 임프린트 리소그래피 공정을 이용한 유연 기판 상의 마이크로 패턴 제작에 관한 연구
심종명(Jongmyeong Shim),제순규(Soonkyu Je),한정진(Jungjin Han),강신일(Shinill Kang) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
A method using a roll imprint lithography is proposed to fabricate conductive patterns and tracks on large area flexible substrate with low cost. Conductive indium tin oxide(ITO) patterns and tracks with line widths of 2~20㎛ were formed using the roll imprint lithography process. The geometrical and electrical properties of fabricated conductive ITO patterns and tracks were measured and analyzed.